Certain node properties can be inherited by nodes at a lower level. This design enhancement, new in KNM v5.0, affects nearly every other aspect of configuration. With inheritance you can propagate configuration changes to hundreds, even thousands, of devices and monitors effortlessly, simply by making changes to a higher level node in the navigation tree.
For any one node you can elect to use either an inherited setting or override it. For example, the image below shows a setting that is inherited from a higher level node. You'll spot this same convention used throughout the Network Monitor user interface for many different types of properties. Note that overriding an inherited setting affects all lower level nodes inheriting the changes you make. Inheritance is enabled by default for every property that supports it.